APA (7th ed.) Citation

Geological Survey (U.S.) & United States. National Park Service. (1970). The river and the rocks: The geologic story of Great Falls and the Potomac River Gorge. For sale by the Supt. of Docs., U.S. Govt. Print. Off..

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and United States. National Park Service. The River and the Rocks: The Geologic Story of Great Falls and the Potomac River Gorge. [Washington: For sale by the Supt. of Docs., U.S. Govt. Print. Off., 1970.

MLA (8th ed.) Citation

Geological Survey (U.S.) and United States. National Park Service. The River and the Rocks: The Geologic Story of Great Falls and the Potomac River Gorge. For sale by the Supt. of Docs., U.S. Govt. Print. Off., 1970.